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July 15-20 Severe Weather


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The high-res models and the RUC are SCARY for nrn IL/srn WI this evening...if we get deep initiation there will be much hell to pay.

Did you copy and paste the same comment from Sat evening? j/k. I'm surprised then that TOR probs from SPC are 2%. Is wind going to be the main threat?

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The high-res models and the RUC are SCARY for nrn IL/srn WI this evening...if we get deep initiation there will be much hell to pay.

They all seem very quick to develope convection, hard to discount it when that's the case. Svr parameters are on the upswing again following a lull from this morning and our trigger is making it's way south. Just gonna have to wait and see.

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Did you copy and paste the same comment from Sat evening? j/k. I'm surprised then that TOR probs from SPC are 2%. Is wind going to be the main threat?

Probably but I wouldn't hinge a bet on it. Explosive setup in place really. Current mesoanalysis has MLCAPE of 5500J/kg in SW WI w/0-1km SRH of 200J/kg and 0-6km shear of 30-40kt. Moisture convergence is increasing in the vicinity of the building Cu field and that may be where things go berserk.

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Going by LOT aviation update, they're not expecting anything until late tonight, not sure i totally agree.

They're probably assuming the convection you'll be getting will be from the N Wisconsin storms, which would probably not make it there until 9 or 10. Good chance something else pops further south, though.

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Wow, I'm surprised we got some storms after all. They had some strange orientation to them looking at the radar though.

I was on my way home from work and got caught in them.

I was heading out of downtown at Harper and Gratiot (other Detroit members know where that's at) and easily had 50 to 60 MPH winds (before the rain). The debris alone (blowing in a straight-line) was reducing visibilites well below a mile. The storm clouds the entire time were quite ominous too.

I'm also glad we made it to 95*F before the storms.

Great summer day after all. :thumbsup:

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Wow, I'm surprised we got some storms after all. They had some strange orientation to them looking at the radar though.

I was on my way home from work and got caught in them.

I was heading out of downtown at Harper and Gratiot (other Detroit members know where that's at) and easily had 50 to 60 MPH winds (before the rain). The debris alone (blowing in a straight-line) was reducing visibilites well below a mile. The storm clouds the entire time were quite ominous too.

I'm also glad we made it to 95*F before the storms.

Great summer day after all. :thumbsup:

Yeah it was a weird looking line for sure. Now something else trying to get going near Lansing...although it looks to track southwest of both of us.

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Yeah it was a weird looking line for sure. Now something else trying to get going near Lansing...although it looks to track southwest of both of us.

Yeah, I doubt we see anything else today, but the sun is back out. It should heat back up nicely before sunset.

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DVN

ATMOSPHERE WAS CAPPED THIS

AFTERNOON WITH A WEAK FRONTAL BOUNDARY LOCATED ACROSS SOUTHERN MN

INTO NORTHEAST IA. MORE STORMS WERE FIRING IN NORTHERN WI IN THE WEAK

CAP REGIME. SHORT WAVE SEEN ON WATER VAPOR THAT CAME OUT OF THE

ROCKIES WAS LOCATED IN SOUTHWEST MN. DEWPOINTS IN THE LOWER 80S WERE

POOLING ALONG THAT BOUNDARY WITH CAPES AS HIGH AS 7000 J/KG IN

SOUTHWEST MN. CAPES WERE 6000 J/KG IN CENTRAL IA BUT ATMOSPHERE WAS

STRONGLY CAPPED.

TONIGHT...LOW CONFIDENCE ON CONVECTIVE TRENDS AS ATMOSPHERE IS

CAPPED AND FRONTAL BOUNDARY IS TO OUR NORTH. OPERATIONAL MODELS

SHOWING MIXED SIGNALS WITH THE RAPID REFRESH/GFS INDICATING A LINE

OF DAMAGING STORMS SWEEPING ACROSS THE CWA LATE THIS AFTERNOON INTO

THE EVENING WITH THE ECM DRY. SHORT WAVE COMBINED WITH FRONTAL

BOUNDARY AND HIGH CAPES SUGGEST POTENTIAL FOR EXPLOSIVE DEVELOPMENT

OF THUNDERSTORMS IF CAP BREAKS. IF THIS SCENARIO PANS OUT THEN A

DESTRUCTIVE DERECHO WITH WINDS OVER 100 MPH IS CERTAINLY POSSIBLE.

CORFIDI VECTORS WOULD TAKE THE THUNDERSTORMS SOUTHEAST ACROSS MUCH

OF THE DVN CWA. IF THE CAP HOLDS THEN WE WILL REMAIN DRY.

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